Okay I have asked this before but it was very broad. I want to render effects like Thaumcraft and when the Enderdragon dies, the purple lights like when you hit the runic matrix and the lights happen what is it called and how would you do this? is there any examples anywhere for this? I know how to do the particles like the explosions to.

 

 

http://static.planetminecraft.com/files/resource_media/screenshot/1308/Enderdragon_4886364_lrg.jpg[/img]

If you want to do something similar to a vanilla feature, look at the implementation of that feature. In this case, the purple beams shown when the Ender Dragon dies are rendered by

LayerEnderDragonDeath

.

I have i used it in a onBlockActivated and nothing showed

You can't just render from an arbitrary method that's only called once, you need to render the effect every frame from a dedicated client-only class like a

Render

,

LayerRenderer

or

TileEntitySpecialRenderer

.